Machine for cutting or indenting pipes.



UNITED srngngsnnr orrron.

WILHELM HAAS. KARL GERZBEK, AND ALOIS LAMPEL, OF FLORIDSDORF, NEARVIENNA, AUSTRIA-HUNGARY.

MACHINE FOR CUTTlNG OR INDENTING PIPES.

Specification of Letters Patent.

`Patentecl Aug. '7, 1906.

Application filed March 26, 1906. Serial No. 308,134.

-To a/ZZ whom t may concern:

Be it known that we, WILHELM I-lAAs, KARL GERZBEK, and ALois LAMPEL,subjects of the Emperor of Austria-Hungary, residing at Floridsdorf,near Vienna, in the Empire of Austria-Hungary, have invented certain newand useful Improvements inMachines for Cutting or Tndenting Pipes, ofwhich the following is a specification.

This invention relates to an improved tool for cutting pipes or tubes orfor producing grooves, constrictions, or the like in the circumferencethereof.

The known pipe-cutters, pipe-wrenches, and similar tools for treatingthe circumferences of pipes, comprising more than two pivoted armssupporting disks or wheels, have the disadvantage that when pressure isapplied at one point most of the wheels or disks are removed from thepipe instead of being caused to act on the latter. In the improved toolthis disadvantage is obviated by means of two curved arms pivotallyconnected to a guide and adapted to be interlocked at their free ends bymeans of suitable teeth. Recesses are provided in the said guide andarms for the insertion of the rod or lever by means of which the tool isoperated.

The invention is illustrated in the annexed drawings, which represent atool comprising wheels or disks adapted to produce circumferentialgrooves or indentations in pipes of tubes.

Figure 1 is a side view, partly in section 5 Fig. 2, an edge view, andFig. 3 represents a specimen of work executed by means of the improvedtool.

1 is a guide provided with grooves engaged by lateral projections 3 of alongitudinallymovable but not rotatable part 2. A T- shaped slot at thelower end of the latter is engaged by a correspondingly-shaped head 4 ofa screw 5, which engages a threaded portion of the guide 1. At the upperend of the part 2 an exchangeable roller 7 is supported by means of anaXle 6. At each side of the guide 1 two parallel lugs 8 are provided,between which is pivoted a curved arm 9, and the two arms 9 are providedat their upper ends with teeth 10, adapted to rigidlyinterlock the saidarms. Each of the latter supports, by means of an aXle 6, a roller 7,similar to the roller supported by the part 2.

The shape and construction ofthe rollers 7 used depends upon the purposefor which the tool is to be employed. Each of the rollers 7 (shown inthe drawings) is provided with two blunt circumferential ribs adapted toproduce grooves in the circumference of the pipe, the depth of saidgrooves being limited by the abutment-surfaces 11 of the roller. It isobvious that each of the rollers 7 might be provided with a single ribor. with more than two ribs, if desired. For cutting pipes or tubesdisks or wheels with sharp circumferential edges are used.

In Figs. 1 and 2 a tube c is shown in contact with the rollers 7, thesaid tube being of the maximum diameter which can be dealt with with thepair of arms 9 illustrated. Tubes of smaller diameter can be dealt withwith the same pair of arms, as indicated in Fig. 1 by the dotted linesc. For treating tubes of larger diameter a larger pair of arms 9 areused. Two guides 1 and four arms 9 allow, for example, of dealing withtubes ranging in diameter up to four inches.

The method of using the tool will be described with reference to thespecimen of work shown in Fig. 3. The tubular part c is a union which isto be used for coupling the ends of two pipes a and b, the junctionbeing made by producing circumferential constrictions or indentations din the part c, and thus causing portions of the latter to bite into theouter surfaces of the pipes a and b. The constrictions d are produced bymeans of the tool shown in Figs. 1 and 2 after the insertion of thepipes a and l) into the union. For this purpose the arms 9 are unlockedby depressing one of them in the direction of the arrow 12 (shown inFig. 1) and moving them apart in the directions indicated bythe arrows13 in the same figure. The union c is then placed between the said arms9, and the latter are thereupon moved together again and relocked. Thescrew 5 is then rotated by means of a pin 15 passing through a hole inthe head 14 of said screw until the union c is IOO If necessary, thescrew 5 ILS the work issurrounded by' sufiicient open space, it isobviousthat the tool can during the indenting or cutting action becaused to traverse a complete circle around the work, whereas if thework is located close to a wall or in the angle between two walls placedat ninety degrees to each other a rocking movement must be 'imparted tothe tool. For this purpose the `lever 16 can be caused to engagerecesses 19 in the arms 9 or recesses 17 in cheeks 18, formed on theguide 1, so that the tool can be rotated to an extent sufficient tocause each rolle'r 7 to roll through an arc subtending an angle of morethan one hundred and twenty degrees, Complete circular action of thethree coperating rollers is thus secured. If necessary, a temporaryrecess can be made in the adjacent wall to afford the necessaryclearance for the tool, the said recess being iilled up with plaster orthe like when the work has been done. This obviates the necessity ofremoving or detaching the pipes before applying the tool.

What we claim as our invention, and desire to secure by Letters Patentof the United States, is-

Y 1. A tool for cuttingv or indenting pipes comprising in combination aguide, curved arms pivoted to said guide between which the work isplaced, interlockable teeth at the free ends of said arms, tools carriedby the latter, a block slidable inthe guide, a tool carried by saidblock, and a screw acting on said block for holding the tools in contactwith the work, substantially as described.

2. A tool for cutting or indenting pipes comprising in combination aguide, curved' arms pivoted to said guide between which the work islaced, interlockable teeth at the free ends ofpsaid arms, tools carriedby the latter, a block slidable in the guide, a tool carried by saidblock, a screw acting on said block for holding the tools in contactwith the work and means for rotating the entire ltool axially about thework, substantially as described;

3.l A tool for cutting or indenting pipes comprising in combination aguide, curved arms pivoted to said guide between which the Work isplaced, interlockable teeth at the free ends of said arms, rotatabletools mounted in the latter, a block slidable in the guide, a toolcarried by said block, a screw acting on said block for holding thetools in contact with the work and means for continuously andintermittently rotating the entire tool axially about the work,substantially as described.

In witness whereof we have signed this specification in the presence oftwo witnesses.

WILHELM HMS. KARL GERZABEK. ALOIS LAMPEL.

Witnesses:

HANS PAPPENHEIM, i' ALVEsTo S. HOGUE.

